/Engine/Plugins/Runtime/GameplayAbilities/Source/GameplayAbilities/Public/GameplayEffect.h
Add a definition to be captured by the owner of the container. Will not add the definition if its exact match already exists within the container.
void AddCaptureDefinition ( const [FGameplayEffectAttributeCaptureDefinition](API\Plugins\GameplayAbilities\FGameplayEffectAttributeCaptureD-) & InCaptureDefinition )